Jones and Marsden offer us a high level way to design mobile devices. The emphasis is on cell phones. But there is the broader scope of various types of handheld devices, like PDAs. They suggest how to design within the typically severe constraints imposed upon you. Like low power, small screen, a limited keyboard or keypad. The small screen means that menus have to be carefully thought out.
Various ways of prototyping are given.
The book has informal case studies of actual product design methods used by Nokia, HP and other companies. Some of you will find these valuable, as a tangible focus for study. All of this is explained at a level understandable to a broad audience.